<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :unique-opened="true"
          :collapse-transition="false"
          :collapse="isCollapse"
          :router="true"
          :default-active="activePath"
        >
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      isCollapse: false,
      activePath: '',
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-username',
        103: 'iconfont icon-component',
        101: 'iconfont icon-cart',
        102: 'iconfont icon-order',
        145: 'iconfont icon-tongji'
      }
    }
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      this.activePath = activePath
    },
    // 获取所有的菜单
    async _getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    }
  },
  created() {
    this._getMenuList()
    this.activePath = this.$route.fullPath
  }
}
</script>

<style lang="stylus" scoped>
.home-container
  height: 100%
.el-header
  background-color: #373d41
  display: flex
  justify-content: space-between
  align-items: center
  padding-left: 0
  color: #fff
  font-size: 20px
  > div
    display: flex
    align-items: center
    img
      height: 60px
      transform: scale(0.8)
    span
      margin-left: 15px
.el-aside
  background-color: #333744
  .el-menu
    border-right: none
.el-main
  background-color: #eaedf1
.iconfont
  margin-right: 10px
.toggle-button
  background-color: #4a5064
  font-size: 10px
  line-height: 24px
  color: #fff
  text-align: center
  letter-spacing: 0.2em
  cursor: pointer
</style>
